Method and apparatus for making continuous tin foil



F. KoLB l uETuon-Aun APPARATUS Fony MAKING CONTINUOUS TIN FOIL Filed oct. 4, 1924 2 sheets-sheet I "July 28, 1925V F. KoLB METHOD AND APPARATUS FOR MAKING CONTINUOUS TI'N FOIL lFiled oct. 4, 192,4 2 snets-sneet 2 l elevational view of the preferred form of apv Patented July 2.8, 1925.

FRED xoLB, or' sfr. LOUIS, MISSOURI.,

METHOD AND APrARATUs Foa MAKING ooiv'ifmuous TIN FOIL.

'Application med 'oe/caber 4, 1924. serial uo. 741,574.

`To all whom it may concer/n.'

Be it known that I, F RED KoLB, a citizen of Ithe United States, residing at the city of St. Louis and State of Missouri, have invent-- ed certain new and useful Im rovements in Methods and Apparatus for w aking Continuous Tin Foil; and I do hereby declare the following to be a full, clear, and exact description of the same, reference :being had tothe accompanying drawings, forming part p of thisspecification. p y

This invention relates to'a method of and apparatus for making tin` foilV and particularly to the making of a continuous -sheet of such material; I i

Vhile the primary obj ect of the invention is the production of a continuous sheet of tin foil, vanother object contemplated is the provision of means yfor coating one side of the lead core 'with a heavier' layer of tin than lthat deposited von the-other side.

#With these and other objects in view, the invention consists incertainnovel details of construction and combinations and arrange-` ments of parts all as will hereinafter be more fully described and the novel features thereof particularly pointed out inthe ap.k

pended claims. u u u In theaccompanying draw1ngs,- Y

Figs. 17 and 1a 'ointly illustrate a side paratus embodyingthe invention of the instant case. l l y. 1

Fig. 2 is a detail view of a, portion of the `means for giving the coreV a preliminary `f i coating yof tin.

- Fig. 3 4is a diagrammatic. view lof meansV for spraying the p'reliminarily coated core with the final coatlng of tin. j

Fig. 4 is a longitudinal sectional vlew of A spraying devicefor sprayingthe molten tin.

on the sheet.l

structure shown in'Fig. 4; and

which: govern the width ofthe finished produc. n 4 i Fig. 7 is an Vend view ofthe structure shown in-Fig. 5,the view being taken in a direction opposite to that. ofthe arrows usedV for indicating F ig. 6. y l

The first few steps in the method and apparatus contemplated by the present invention maybe practicedl'with apparatus now in common use. lFor-instance, the molten material, 'such as lead, which'is to c-onstitutethe core o-f the tin foil, is contained in a reservoir 10 from which vit is regulably and constantly discharged onto an inclined table ory platform- 11 on which it takes the formV of a iilmror sheet. To aidy iny solidifying the core, the table 11 may be formed with interior passages for the circulation of 'any cooling medium such as water. As the sheet of lead, or other core material, is drawn ofthe table 11, it passes between, suitable sizing rolls 12 which may be provided in accordance 4with common*y practice, a scraper 13 being here shown at the discharge side of said rolls. After passing beyond the scraper, the core is passed through twotanks 14, 15', the former'containing 4vthe `.usual cleaning acid and the latterl water for washing the core clean of theV acid, suitable guides 16Lbeing provided in said-tanks to insure the core being immersed. Both the bath of acid 'and of waterr may bemaintained at the proper temperatures by heat applied thereto through the heating chambers 14a,` 15a,V- and drains for said tanks are 'also'provided, as indicated After coming out of the lwashing 1' bath, the end-less vcore passes into a bath ofmolten tin for the purpose of--preliminarily coating both; sides thereof. To'secure proper submergence of the core in this bath of tin in the tank- 18 vertically movable guidesf19 .y are provided. PreferablyV guides 19 are supported from one end of cables 20, the cables extending over pulleys 21 with ytheir oppol site endseach supporting a counterbalance 22. This permits the operator to raise and dip theendless core any number of times desired to give thel core its proper preliminarycoating. At "the base of vtank 18 there is formed a yheating chamber 18a v Y l and vwithin said tank, preferably vat the F ig. 5 is a transverse lsectionalgview ofthe Y bath, there are Fig 6 is a detail view ofthe edging rolls `After leaving the tank'lS, the core, preliminarily coated, passes between two spray through which air under ing devices 24 which deposit additional ad' i on the opposite sides ofthe core, this being the l'inal coating step. As shown rmore f in detail inFigs. `3 ,to 5 each sprayer consists of a nozzle comprising an inner-pipe 25,;

anda sleeve`26 concentrically arranged on* other. In the fork of the collar on pipe 25l is a trunnion nut 33 and in the collar on sleeve 26 there is a trunnion sleeve 34 on whose outer- 'face is a dial 85 preferably marked with one hundred circularly arranged equi-distantly spaced graduations. lVorking in said nut and sleeve is a screw 36 held against total Withdrawal .of collars 37, 38 and on collar 38 thereis a pointer 39 adapted to cooperate with the series of graduations on the trunnion sleeve. Sleeve 26 isV loose on pipe 25andby manipulating screw 36 the openings 1n said collar and sleeve can be so movedwith respect tol each other as to vary the size of thel opening and thereby Aregulate the amount of molten tin dis-Y charged, as desired. As the regulation of one nozzle is entirely independent of that of the other it is apparent that the amount o-tin deposited on one side of the core can be varied from, that deposited on the oppositeI Iside, thereby givingvone side a .heavier coat than the other. `This is an advantageous feature. To adapt the spraying nozzles to use on cores of diierent widths, longitudinally 'spaced rings 40 are provided on' the nozzles, each carrying a strip 50 working in theslot in sleeve 26. The rings 40 are locked at any point on the nozzle by set'screws but by loosening up the screws, the strips may be moved vtoward or away from eachother to vary the length. ofv the slot ras desired, Themetal in tank 28 is heated from the combustion chamber 41 and suitable drains 42 and 43 are also provided i for the two tanks of tin.

After 'leaving the spraying nozzles, the fully coated core passes over a cooling table 44, similar to table 11, and from thence it passes through between edging rolls 45 at opposite edges of the core. These rolls 45 are .preferably adjustable Vhorizontally to. ward andv away from each other to accommodate different width cores.

Beyond the edging rolls, the coated core is passed between suitable iinishing rolls 46 wliichmay be of any commercial form and from these rolls the finished product is conveyed to a spool or winding roll 47 or other suitable place for storage. I

What VI claim is: f.

l. A 'continuous method of making tin foil which consistsin forminga continuous position on oppo-site sides of said core to give it the desired coating of tin, and finally passing said tin coated core through finish-` ing rolls.

2. A continuous method of making tin foil which consists in forming a continuous core of suitable material, passing said core through cleaning and washing tanks, depositing a preliminary coating of tin on opposite sides of the core, subsequently sprayn ing molten tin composition on said core and finally passing said tin coated core through inishing rolls. .A

3.A continuous methodof making tin foil such as described in claim 2 characterized by regulating the inal spraying of tin o'n the core to deposit a heavier coating of tin on oneside than on the other side.V

4. A continuous method of making tin foil such as described in claim 2 characterized by regulating the iina-l spraying of tin on the core todeposit a.A heavier coating on one side than on the other and simultaneously spraying both sides of said core.

5. A continuous method of making tin foili which consists in forming a continuous core of suitable material, passing it through cleaning and washing liquids, immersing said core to coat yit with a preliminaryk deposit ofV tin, subsequently sprayinga molten tin com-A position on opposite sides of said core to give it the desired vcoating ofV tin, :passing said tin coated core through edging rolls to determine the width of the finishedproduct, andY finally passing said tin ycoated core through finishing rolls.

6. In an apparatus for continuously vproducing tin oil, the combination of a reservoir for the molten material forming the core ot the iinished product, a 4pouring plate or table, on'which the molten material is de posited in filmlike form, means for cooling the material as it passes over the table to form the core, sizing rolls, cleansing yand. washing receptacles through which the core passes, means for placing a preliminary de-` posit of tin on the core, means fory subsequently spraying opposite'sides of the core with a coating of tin, and finishing rolls through which the tin coated core is passed. Y 7, Inv an lapparatus for making ltin foil, a

.reservoir for a molten material fromvwhich a suitable c ore is formed, a cooling table overwhich said material is poured from said reservoir to form aj continuous core, sizing rolls, and cleaning and washing rtanks* through which said endless core passes, a preliminary bath of molten4 tin in which said endless core is immersed, means for subsequently spraying opposite sides of said core ,withV a linal coatingvof `molten tin, and

lio

finishing rolls through which said core With the final coating thereon is passed.

8. An apparatus such as set forth in claim 7, characterized by the provision of edging rolls intermediate the finishing rolls and the means for depositing the inal coating of tin on the core.

9. An apparatus such as set forth in claim 7, characterized by the spraying means comprising a pair of concentrically arranged pipes having spraying orifices therein, a body of molten tin, a pump located in said tin connected with said pipes, and means for adjusting the concentrically arranged pipes one on the other to vary the size of said openings.

10. An apparatus such as described in claim 7, characterized by the spraying means comprising a pair of concentrically arranged'` pipes on each side of the endless core and each pair of pipes having discharge openings therein, a pump for supplying molten tin to each pair of pipes and separate means for regulating the discharge of molten tin from-each pair of pipes whereby a heavier coating of tin may be deposited on one side of the core than on the other.

11. An apparatus such as set forth in claim 6, characterized by the provision of a tank containing the tin used for preliminarily coating the core and means Within said tank toprevent the accumulation of dross and dirt at' the points Where the core enters and leaves said tank.

FRED KOLB. 

